Chair



FIG. 1 is a front perspective view of my new and ornamental design for a chair;

FIG. 2 is a right side view thereof;

FIG. 3 is a right perspective view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a back view thereof;

FIG. 6 is a back perspective view thereof; and,

FIG. 7 is a top perspective view thereof. 

The ornamental design for a chair, as shown and described. 